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Eumetazoa (metazoans)
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Bilateria (bilaterally symmetrical animals)
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Protostomia (protostomes)
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Sipuncula (peanut worms)
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Class Not assigned
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Order Not assigned
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Family Sipunculidae
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Genus Phascolopsis
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Genus Siphonomecus
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Genus Siphonosoma
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Genus Sipunculus
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Genus Xenosiphon
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